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Searching for single production of vectorlike quarks decaying into Wb at a future muon-proton collider

Jin-Zhong Han1,*, Yao-Bei Liu2,†, and Stefano Moretti3,4,‡

  • *Contact author: hanjinzhong@zknu.edu.cn
  • †Contact author: liuyaobei@hist.edu.cn
  • ‡Contact author: stefano.moretti@cern.ch
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Phys. Rev. D 112, 035016 – Published 12 August, 2025

DOI: https://doi.org/10.1103/6njz-xvr6

Abstract

This work investigates the discovery potential for singly produced vectorlike quarks (VLQs) T (Q=+2/3e) and Y (Q=−4/3e) decaying to Wb at future μp colliders with s=5.29, 6.48, and 9.16 TeV, analyzing both leptonic and hadronic W decay channels through detailed detector simulations. The hadronic channel demonstrates superior sensitivity, enabling 5σ discovery up to mT=3750  GeV (mY=4100  GeV) at 9.16 TeV with 100  fb−1, while exclusion limits reach mT=4500  GeV (g*≥0.06) and mY=4800  GeV (κY≥0.04)—significantly beyond LHC capabilities. At 5.29 TeV, discovery regions cover g*∈[0.15,0.5] for mT∈[1500,2520]  GeV and κY∈[0.12,0.5] for mY∈[1700,2700]  GeV, with exclusions extending to mT=2750  GeV and mY=3020  GeV. These results, obtained within a simplified two-parameter framework (mT/Y and electroweak couplings g*), establish μp colliders as uniquely powerful tools for probing high-mass VLQ states, particularly in the boosted jet regime.

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Phys. Rev. D 112, 035016– Published 12 August, 2025
  • Received 15 February 2025
  • Accepted 29 July 2025
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